@article{MZ_1968__104_170955,
     author = {S.M. Shah and Charles Rees},
     title = {On the {Absolute} {N\"orlund} {Summability} of a {Fourier} {Series.}},
     journal = {Mathematische Zeitschrift},
     pages = {388--393},
     publisher = {mathdoc},
     volume = {104},
     year = {1968},
     zbl = {0157.38401},
     url = {http://geodesic.mathdoc.fr/item/MZ_1968__104_170955/}
}